This DVA-C02 practice question tests your understanding of security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A developer is using AWS Lambda to process files uploaded to an S3 bucket. The Lambda function needs to read the files and write results to a DynamoDB table. What is the MOST secure way to grant the necessary permissions?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create an IAM execution role for Lambda with permissions to read from S3 and write to DynamoDB.
Option A is correct because Lambda execution roles are the recommended way to grant permissions to Lambda functions. Option B is wrong because resource-based policies on S3 and DynamoDB are used for cross-account access, not for Lambda. Option C is wrong because hardcoding credentials is insecure. Option D is wrong because S3 bucket policies do not grant Lambda permissions; they grant access to the bucket.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Attach a resource-based policy to the S3 bucket and DynamoDB table allowing access from the Lambda function.
Why it's wrong here
Resource-based policies are for cross-account, not for same-account Lambda.
✓
Create an IAM execution role for Lambda with permissions to read from S3 and write to DynamoDB.
Why this is correct
Execution roles are the best practice for Lambda permissions.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure the S3 bucket policy to allow the Lambda function's ARN.
Why it's wrong here
Bucket policy grants access to the bucket, not to Lambda.
✗
Store AWS access keys in the Lambda environment variables.
Why it's wrong here
Hardcoding credentials is insecure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create an IAM execution role for Lambda with permissions to read from S3 and write to DynamoDB. — Option A is correct because Lambda execution roles are the recommended way to grant permissions to Lambda functions. Option B is wrong because resource-based policies on S3 and DynamoDB are used for cross-account access, not for Lambda. Option C is wrong because hardcoding credentials is insecure. Option D is wrong because S3 bucket policies do not grant Lambda permissions; they grant access to the bucket.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This DVA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DVA-C02 exam.
Question Discussion
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